CVE-2026-74701
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
net/openvswitch: check Ethernet header length in key_extract()
In the Linux kernel, the following vulnerability has been resolved: net/openvswitch: check Ethernet header length in key_extract() When a packet arrives on an ARPHRD_NONE device (e.g. TUN), ovs_flow_key_extract() trusts the user-provided skb->protocol field: if it is ETH_P_TEB, the packet is classified as MAC_PROTO_ETHERNET and key_extract() is called without ensuring the skb has ETH_HLEN (14) bytes of linear data. key_extract() unconditionally pulls 2 * ETH_ALEN bytes for MAC addresses and parse_ethertype() pulls 2 more, either of which triggers a kernel BUG in __skb_pull() when the linear area is too small. kernel BUG at include/linux/skbuff.h:2848! RIP: 0010:key_extract+0xa7e/0xd90 net/openvswitch/flow.c:933 ovs_flow_key_extract+0x419/0xa70 ovs_vport_receive+0x222/0x390 netdev_frame_hook+0x3e0/0x630 tun_get_user+0x2d0c/0x38e0 Fixed by calling check_header() in key_extract() before accessing the Ethernet header.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 217ac77a3c2524d999730b2a80b61fcc2d0f734a | affected | git | e85278afd4890dd190ba3c7a1b1a712b801c9fe1 | Unavailable | None listed |
| 217ac77a3c2524d999730b2a80b61fcc2d0f734a | affected | git | 81f9b09f0ea3ba9ab966dd17e9f32625a14555e9 | Unavailable | None listed |
| 217ac77a3c2524d999730b2a80b61fcc2d0f734a | affected | git | 831471718f6e19aed1a330b03b53190a90e06466 | Unavailable | None listed |
| 217ac77a3c2524d999730b2a80b61fcc2d0f734a | affected | git | d8bea341b183190ce6c055ab0e64ab78eb9a7290 | Unavailable | None listed |
| 217ac77a3c2524d999730b2a80b61fcc2d0f734a | affected | git | 0b60b55652ba772b173dddc63f3851e1d2dd5927 | Unavailable | None listed |
| 217ac77a3c2524d999730b2a80b61fcc2d0f734a | affected | git | a8139285c8925efe59af28a9169bb2fda91bff15 | Unavailable | None listed |
| 217ac77a3c2524d999730b2a80b61fcc2d0f734a | affected | git | 9b8cfbb58b85bfa7a78fac47fdc77396cd01f699 | Unavailable | None listed |
| 217ac77a3c2524d999730b2a80b61fcc2d0f734a | affected | git | cf6f8b29befb92173659bcef6a441d274947bfae | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.10 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.10 | Unavailable | None listed |
| 5.10.265 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.216 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.183 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.152 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.104 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.45 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.9 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |